- Tremadocian
- тремадок, тремадокский ярус (ордовика)
* * *тремадок
English-Russian dictionary of geology. 2011.
Tremadocian
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Tremadocian — The Tremadocian is the first internationally recognized stage of the Ordovician Period of the Paleozoic Era. It lasted approximately 9.7 million years, from about 488.3 ± 1.7 to about 478.6 ± 1.7 Ma (million years ago).The Tremadocian began at… … Wikipedia
Tremadocian Stage — ▪ geology lowermost of the two standard worldwide divisions of the Lower Ordovician Series and lowest of the seven stages within the Ordovician System (Ordovician Period). It encompasses all rocks formed during the Tremadocian Age, which… … Universalium
Tremadocian — … Useful english dictionary
Ordovician — Period 488.3–443.7 million years ago … Wikipedia
Ordovician Period — Interval of geologic time, 490–443 million years ago, the second oldest period of the Paleozoic Era. It follows the Cambrian and precedes the Silurian. During the Ordovician, many of the landmasses were aligned in the tropics. Life was dominated… … Universalium
Geologic time scale — This clock representation shows some of the major units of geological time and definitive events of Earth history. The Hadean eon represents the time before fossil record of life on Earth; its upper boundary is now regarded as 4.0 Ga.[1] Other… … Wikipedia
Geology of the North Sea — Contents 1 Tectonic structure 2 Precambrian 3 Finnmarkian, Athollian, Caledonian Orogenies … Wikipedia
Cambrian — For other uses, see Cambrian (disambiguation). Cambrian Period 542–488.3 million years ago … Wikipedia
Carboniferous — For the album by Zu see Carboniferous (album). Carboniferous Period 359.2–299 million years ago … Wikipedia
Cretaceous — Period 145.5–65.5 million years ago … Wikipedia
Devonian — For the Celtic language, see Southwestern Brythonic language; for the residents of the English county, see Devon. Devonian Period 416–359.2 million years ago … Wikipedia
